Answer:
Part A: x = 5
Part C: x = 16
Explanation:
Since this graph counts by two on the x-axis, and Part A is in-between 4 and 6, we can assume that x = 5, based on the information given. If we continue this line of almost perfect coordinates, Part C can be assumed as x = 16. I'm not sure what year though, but I can assume that A could be 1905, and C being 1916.